#include <stdio.h>  
#include <unistd.h>  
  
int main() {  
    char *argv[] = {"/bin/ls", "-l", NULL};  
    char *envp[] = {NULL};  
  
    printf("Before execve\n");  
  
    if (execve("/bin/ls", argv, envp) == -1) {  
        perror("execve");  
        return 1;  
    }  
  
    printf("After execve\n");  
  
    return 0;  
}
